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Detector Characterization of GEO600

Detector Characterization of GEO600. 4th Edoardo Amaldi Conference On Gravitational Waves UWA - Perth, Australia Karsten Kötter - 2001-07-10. Detector Characterization (1). First P hase: Improve Detector Performance identify noise sources track down transients

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Detector Characterization of GEO600

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  1. Detector Characterization of GEO600 4th Edoardo Amaldi ConferenceOn Gravitational Waves UWA - Perth, Australia Karsten Kötter - 2001-07-10 Karsten Kötter

  2. Detector Characterization (1) • First Phase:Improve Detector Performance • identify noise sources • track down transients • Detector is a large and complex device • data from many sensors have to be monitored (and recorded) at the same time • detector data • environmental data Karsten Kötter

  3. Detector Characterization (2) • Second Phase:create vetoes for h-channel • external influences make data from h-channel invalid • periods of invalid data have to be marked • understand noise propagation in detector • determine thresholds in environmental disturbances that affect h-channel Karsten Kötter

  4. Available channels Karsten Kötter

  5. environmental channels (1) • already available sensors • magnetic field • seismic motion • foundation • suspension system • power line • indoor/outdoor temperature • acoustics (air/tanks) • wind speed/direction Karsten Kötter

  6. environmental channels (2) • planned • air pressure • vacuum pressure • electric field Karsten Kötter

  7. detector channels • Mode Cleaner • PDH error point • visibility (reflected light) • auto-alignment • rotation • tilt • mirror positions Karsten Kötter

  8. seismic noise spectrum Karsten Kötter

  9. transient – seismic motion Karsten Kötter

  10. transient - ModeCleaner control Karsten Kötter

  11. coherence: seismic motion Karsten Kötter

  12. transient - magnetic field Karsten Kötter

  13. Detector signals during lightning Karsten Kötter

  14. coherence: mag. field gradient Karsten Kötter

  15. temperature fluctuations Karsten Kötter

  16. Summary • Detector characterization • detector improvement • h-channel vetoing • DAQ system • signals • detector • environment • measurements • seismic noise • magnetic field • temperature correlation Karsten Kötter

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